Improvement in tool-holder for grindstones



. Taall whom it may concern:

parts.4 Y

A is a plate, provided with journals B at the ends.

gaat entre PHI-.LIP LEONARD, or SHARON, PENNSYLVANIA.

A Letters Patent No. 97,656, dated .December 7,1869.

IMPROVEMENT IN IJQO(,)llh-HOIIIJDIEIR FIOR. GRINDSTONES.

The Schedule referred to in these Letters Patent and making pax'f. of the salme.

` enable others skilled in the art to make and use the same, reference being had tothe accompanying drawings, forming. `part of` this specification.

'lhis `invention relates to improvements in tool-hold i y ing attachments for grindstones, and consists of a plate, y arranged for oscillating in front of the face ofthe grindstone, anda carriage mounted thereon, to slide back and forth, and carrying an adjustable tool-holder mounted on the said carriage,.ainl capable of feeding toward or from the stone, the whole being arranged to hold the` tool in- Contact with the stone, and tonlove it back and forth across the face, in a Way to grind the edges y truly, and at any required beivel.

Figure l represents a perspective view of my i'rnproved attachment applied toa grindstone, the latter beingshown in dotted lines.

Figure 2 represents a sectional elevation of the oarriage and holder.

Similar letters of reference indicate corresponding and near one edge, and mounted in bearings C, on the frameof the stone, so that one edge will rest on the `frame in a way to-maintain the said plate in an inyclined position. i

.The bearings C are made adjustable to or from the I stone, and may be so connected as to be readily detaehed or not. v

'Ihis plateis provided with a slot, D, arranged Iparallel with fthe face of the stone.

E is a carriage, mounted on the face of the plate A, and provided with a headed guide, Il, working in the slot, to` hold it in place when sliding thereon. The slot is widened at one end for the head of this guide.-

G is a tool-holder, mounted on 'the carrier E, and arranged to slide alcng the top thereof, to or from the stone, on suitable ways prepared for it.

H is a feed-screw, mounted in the carriage, and screwing through the holder, to. move it forward'and back.

The holder is provided with a set-screw, I, for clam ping the tools, to hold them in place;V and a clamp, K

ing the ends of the tools down on the face of the carrier when grinding, or it may be used asa guide only.

The lower edge of the plate A may he raised orlow-l ered to anyv required pitch for tools of different bevels at ythe cutting-edges, and a notched lock, L, or set` v if Patent- 1. -The combination, with the slotted oscillating plate A, provided with journals, and either mounted in -adjustableor permanent bearings C, of the carriagegE,

and the adjust-able tool-holder G, substantially as specitied.

2. The arrangement, with the carriage E, of the tool-holder G, and c'lamp or 'guide K, substantially as specified.

Y PHILIP LEONARD.Y

Witnesses:

JAMES W. scorn' JOSEPH HAGGS.

7. is arranged on the upper end ot' the carriage, for clamp- 

